Volume 20, Issue 10, October 2020, Page 1-4.

The sequences produced by the cryptographic sequence generator known as the shrinking generator can be modelled as the output sequences of linear elementary cellular automata. These sequences are composed of interleaved m-sequences produced by linear structures based on feedback shifts. This profitable characteristic can be used in the cryptanalysis of this generator. In this work we propose an algorithm that takes advantage of the inherent linearity of these CA and the interleaved m-sequences. Although irregularly decimated generators have been conceived and (...) designed as non-linear ones, in practice they can be easily analysed in terms of simple linear structures. (shrink)

Keystream sequences should look as random as possible, i.e. should present no logical pattern to be exploited in cryptographic attacks. The generalized self-shrinking generator, a sequence generator based on irregular decimation, produces a family of sequences with good cryptographic properties. In this work, we display a detailed analysis on the randomness of the sequences resulting from the concatenation of elements of this family. We apply the most important batteries of statistical and graphical tests providing powerful results and a new method (...) to construct sequences with good cryptographic properties. (shrink)

Name der Zeitschrift: Der Islam Jahrgang: 94 Heft: 1 Seiten: 66-93.

Wikipedia est devenue en quelques années un outil de diffusion d'informations scientifiques de premier plan, utilisé par élèves, professeurs et chercheurs (parmi ces derniers, un sur dix reconnaît y contribuer). Malgré un système d'édition relativement complexe, le ' wiki de la connaissance ' a gagné en popularité (15 millions d'articles, 270 langues, 100 000 contributeurs bénévoles). On en sait davantage sur son fonctionnement : son taux d'erreur factuel est relativement similaire à celui de l'encyclopédie payante Britannica ; les articles sont (...) souvent rédigés par un petit nombre de contributeurs (5 % des contributeurs sont à l'origine de 90 % du contenu) ; une série d'' administrateurs ' jouent les pompiers ou les gendarmes, non sans s'attirer les foudres d'une partie des contributeurs ; dynamique communautaire et positionnement identitaire sont les deux motivations principales pour contribuer ; les sources scientifiques sont d'autant plus citées dans Wikipedia qu'elles le sont déjà dans le monde scientifique (le ' facteur d'impact ' est involontairement reproduit)... Comparée à ses concurrents, Citizendium et Knol, l'encyclopédie contributive se démarque par son développement insolent, mais l'éventualité d'une stabilisation du nombre d'articles (on assiste aujourd'hui à une sorte de plafonnement) laisse imaginer qu'à l'avenir les contributeurs se concentreront davantage sur la qualité des articles. (shrink)

Depuis une dizaine d'années, des centaines des millions d'internautes ont donné naissance à des édifices informationnels novateurs. Ces dispositifs dits Web 2.0 constituent de nouveaux modèles éditoriaux. Ces changements,qui s'inscrivent dans la continuité de l'histoire des techniques et des usages, accélèrent considérablement les processus historiques en cours. Par la métaphore des frontières, cet article analyse les profondes mutations intervenues dans le domaine des savoirs : question de l'accès, enjeux de la mémoire collective, transformation de la nature des savoirs.

This article examines word-based puzzles as texts. In particular, it analyzes the potential of using a seemingly harmless pastime — the solving of puzzles — for propagandistic ends. Propaganda is an attempt to manipulate and dominate discourses some of whose manifestations are texts. Because a thorough examination of puzzles has not yet been undertaken, word-based puzzles will be considered first in general, followed by a detailed examination of the potential propagandistic impact of puzzles drawn from the official Nazi newspaper, Völkischer (...) Beobachter [Folkish Observer]. (shrink)

Many in the human rights community have expressed concern about the illiberal religious political system found in Iran today. However, Iran is not unique in its illiberal religious nationalism. Some contemporary liberal democracies in the West also have a history of illiberal religious nationalism. The English and later the British discriminated against Catholics in various ways. The Irish also have a history of discrimination against Protestants and inequality towards women which was based on a deep seated illiberal Catholic nationalism. In (...) all of these cases moderation and liberalization occurred over time. An interesting question is whether moderation over time might be repeated outside of Europe, especially in religiously based nations in the Middle East.When looking especially at the evolution of Ireland we notice that: economic prosperity spread throughout the population, the perception of a threat from the United Kingdom declined, European norms were spread within Ireland, and there were scandals within the Catholic Church. All these factors diminished the power of Irish illiberal Catholicism over time. If the external threats to Iran were removed and economic prosperity was to spread, as corruption and scandals came to light, we might expect that Iran may begin to moderate its political system.The goal of this essay is to analyze what conditions are conducive for the gradual transformation from an illiberal, religiously defined nation-state to a more moderate, democratic one by examining Iran and Ireland. This article suggests that the evolution of religiously based political systems can lead to more democratic political systems which are more cooperative with other countries and are less supportive of violence and terrorism. (shrink)

As ethics committees and programs become integrated into the “usual business” of healthcare organizations, they are likely to face the predicament of responding to greater demands for service and higher expectations, without an influx of additional resources. This situation demands that ethics committees and programs allocate their scarce resources (including their time, skills and funds) strategically, rather than lurching from one ad hoc request to another; finding ways to maximize the effectiveness, efficiency, impact and quality of ethics services is essential (...) in today’s competitive environment. How can Hospital Ethics Committees (HECs) begin the process of strategic priority-setting to ensure they are delivering services where and how they are most needed? This paper describes the creation of the Clinical Ethics Needs Assessment Survey (CENAS) as a tool to understand interprofessional staff perceptions of the organization’s ethical climate, challenging ethical issues and educational priorities. The CENAS was designed to support informed resource allocation and advocacy by HECs. By sharing our process of developing and validating this ethics needs assessment survey we hope to enable strategic priority-setting in other resource-strapped ethics programs, and to empower HECs to shift their focus to more proactive, quality-focused initiatives. (shrink)

Hospital ethics committees (HECs) and ethicists generally describe themselves as engaged in four domains of practice: case consultation, research, education, and policy work. Despite the increasing attention to quality indicators, practice standards, and evaluation methods for the other domains, comparatively little is known or published about the policy work of HECs or ethicists. This article attempts to open the ?black box? of this health care ethics practice by providing two detailed case examples of ethics policy reviews. We also describe the (...) development and application of an evaluation strategy to assess the quality of ethics policy review work, and to enable continuous improvement of ethics policy review processes. Given the potential for policy work to impact entire patient populations and organizational systems, it is imperative that HECs and ethicists develop clearer roles, responsibilities, procedural standards, and evaluation methods to ensure the delivery of consistent, relevant, and high-quality ethics policy reviews. (shrink)

The progression of research and scholarly inquiry does not occur in isolation and is wholly dependent on accurate reporting of methods and results, and successful replication of prior work. Without mechanisms to correct the literature, much time and money is wasted on research based on a crumbling foundation. These guidelines serve to outline the respective responsibilities of researchers, institutions, agencies, and publishers or editors in maintaining the integrity of the research record. Delineating these complementary roles and proposing solutions for common (...) barriers provide a foundation for best practices. (shrink)

While caregiving in northern, rural and remote communities takes place in the context of conditions unique to smaller communities, caregivers live with social policies that are shaped by urban norms rather than rural realities. In times of economic decline and government cuts rural issues of limited services and infrastructure as well as dependency on a single industry can lead to unemployment, community and family instability, and a decline in health and well-being. During these times caregivers face increased pressure to voluntarily (...) fill the gaps left by service cuts. Research with women caregivers in four communities in northern British Columbia (BC), Canada explores the experiences of caring and the social, geographic, economic and political contexts within which the caregiving occurs. The discourse of economic efficiencies that speaks solely to the monetary value of care is contrasted with the human condition of connectedness and relationships. These two contradictory perspectives are uncovered during interviews with women caregivers and analyzed in the framework of Olena Hankivsky's discussion of an ethic of care. (shrink)